<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<svg id="svg-root"
  xmlns="http://www.w3.org/2000/svg"
  xmlns:xlink="http://www.w3.org/1999/xlink">

  <g id="testmeta">
    <title>SVG Filter Chains: Second Filter Uses SourceAlpha</title>
    <link rel="copyright"
          href="http://www.w3.org/Graphics/SVG/Test/Copyright"/>
    <link rel="license"
          href="http://www.w3.org/Consortium/Legal/2008/03-bsd-license.html"/>
    <link rel="author"
          title="Max Vujovic"
          href="mailto:mvujovic@adobe.com"/>
    <link rel="help"
          href="http://dev.w3.org/fxtf/filters/#FilterPrimitiveSubRegion"/>
    <link rel="match"
          href="second-filter-uses-SourceAlpha.svg" />
    <metadata class="flags">namespace svg</metadata>
    <desc class="assert">
      In an SVG filter chain, this test verifies that a filter receives the
      correct SourceAlpha input from the previous filter in the chain. If the
      test passes, you should see a blurred green square.
    </desc>
  </g>

  <g id="test-body-content">
    <filter id="blur">
      <feGaussianBlur stdDeviation="3"/>
    </filter>
    <filter id="add-green">
      <!--
        This filter receives transparent black and the alpha channel of the
        previous blur filter. Then, it adds to the green channel where the alpha
        channel is set, resulting in a blurred green square.
      -->
      <feComponentTransfer in="SourceAlpha">
        <feFuncR type="identity"/>
        <feFuncG type="table" tableValues="1 1"/>
        <feFuncB type="identity"/>
        <feFuncA type="identity"/>
      </feComponentTransfer>
    </filter>
    <rect x="100" y="100" width="100" height="100" filter="url(#blur) url(#add-green)" fill="red"/>
  </g>
</svg>
